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270105 VO Analytical Chemistry I (2005W)
Analytical Chemistry I (Fundamentals, Measuring Principles and Statistics)
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Di, 11.15 - 12.00 Uhr, HS I d. Chem. Inst.
Beginn: 04.10.2005
Beginn: 04.10.2005
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Aims, contents and method of the course
Assessment and permitted materials
Minimum requirements and assessment criteria
Introduction into basics of analytical chemistry, measuring principles and statistics
Examination topics
Reading list
Matthias Otto: "Analytische Chemie", VCH Verlagsgesellschaft
Association in the course directory
F130; LA-Ch131
Last modified: Fr 31.08.2018 08:55
Contents:General introduction: definition of analytical chemistry, types of analytical problems, block diagram and performance characteristics of analytical methods.
Analytical measuring systems: Measurement of electrical quantities and methods of digitizing: voltage, current, resistance, frequency; digitizing by dual-slope or successive approximation, Nyquist theorem.
Principles of transducing (discussion of different calibration functions relating to sensitivity and dynamic range): potentiometry (Nernst equation, matrix effects depending on ionic strength, electrodes of first and second order, chemical field effect transistor ChemFET, examples: glass electrode, nitrate - ion-specific electrode, identification of cations), amperometry, electrogravimetry.
Optical measurement (absorption, fluorescence, photoacoustics).
Signal processing: reduction of disturbances by lock-in amplifier, improving signal to noise ratio by averaging, smoothing, analogue and digital filtering, (Fourier analysis and Fourier transformation). Statistical data preparation: uncertainty of results, statistical and systematic error, mean square deviation and bias, significant digits and error propagation, Gauss distribution, confidence region of means, tests for outliers, F-test, t-test, calibration plots.